Incubator.



No. 877,833. PATENTED JAN. 28, 1908.

G. DAHL. INGUBATOR. APPLIVOATION FILED $1111.23, 1907.

INVENTOH,

ATTOHNE Y THE rvarmls PETERS cm, wAsmNc'roN, n. c.

CHRIST DAHL, OF BROOKLYN, NEW YORK.

INCUBATOR.

Specification of Letters Patent.

Patented Jan. 28, 1908.

Application filed January 23. 1907. Serial No. 353.721.

To all whom it may concern:

Be it known that I, CHRIsT DAHL, a citizen of the United States,residing at Brooklyn, in I the county of Kings and State of New York,have invented new and useful Improvements in Incubators, of which thefollowing is a specification.

This invention relates to incubators and has for its object thedisposition of the eggs around the heating means so that they willbecomparatively at the same distance from same and at the same time thecool and foul airs are removed from the incubator and the neo ssarymoisture is provided, as will be furt er explained in the followingspecification pointed out in the appended claims and illustrated in theaccompanying drawings, where like reference characters are used todesignate the same parts in the various figures.

Figure 1 is a front elevation of the improved incubator. Fig. 2 is avertical sectional view of the same. Fig. 3 is a horizontal sectionalview on the line 33. Fig. 4 is a horizontal sectional view on the line44 of Fig. 2.

It is the object of this invention to provide heating means for anincubator which will distribute the warm air to the eggs atapproximately even temperature no matter where they are placed in theapparatus at the same time to relieve the egg chamber from the hot andsmoky atmosphere and pro vide it with proper ventilation and moisture.

The incubator consists of an apparatus of circular structure 5 and ismade of wood or other suitable material, and held together by bands 6and supported by the legs 7. In fitting the parts together a top 8 isprovided which may be also of wood and lit down closely upon thestructure 5 and a bottom 9 having ventilating holes 10 is also provided.

for the bottom of the incubator.

The heating device consists of the lamp 11 which is suspended by meansof hangers 12 from the bottom of the incubator and is provided with theusual adjusting means 13 for the wick, and the burner is surrounded bythe two cylinders 14 and 15, the former carrying the flame and heatedair upward into thebody of the incubator and by means of the lateralflues 16 discharging same into a circular chamber 17 which after itbecomes cool drops toward the bottom of the device thus carrying off thesmoke and impure products of combustion. In this movement of the flamethe surrounding cylinder and the air therein becomes heated, the airpassing out towards the top of the incubator and falling through theeggs towards the bottom 9 and out of the openings 10. Surrounding thecircular chamber 17 is a cylinder or wall 18 which forms one of theinclosing means of the incubator, and surrounding the outside of thechamber 17 is a layer of asbestos or similar material 19 which isadapted to pro tect the wall 18, which is usually of wood, from dangerof ignition.

At the upper end of the wall 18 is a platform 20 which supports a disk21 carrying the tubes 14 and 15 and the cylinder inclosing the chamber17. Secured to the under surface of the platform 20 is a circular box 22having outlets 23 for the distribution of the water carried within theboxes and which is to provide moisture for the interior of the incubatorso that the air will be of proper humidity for the hatching of the eggs.These boxes 22 are shown more clearly in Fig. 4 and they are held inplace by means of the turn-buttons 24 pivoted to the lower side of theplatform 20.

On the upper side of the platform are radial arms 25 which support athermostat 26 which as it expands operates the end 27 of the lever 28 soas to elevate a rod 29 and elevates the cap 30 on the outer end of thelever 31 and opens the outlet 32 and deflects the heat upward and awayfrom the opening 10. The outer end of the lever 31 is provided with theweight 32 to properly adjust it so it will properly operate the disk 30.

In order to evenly distribute the heat throughout this incubator anddown upon the eggs, the heated air passes through the diaphragm 33 ofbolting cloth or similar material of thin texture and falls upon theeggs in the trays 34, which are in this instance arranged in sectionsmade up of four parts and carried on the cleats 35. It will thus be seenthat after the heat is thus evenly distributed and thrown upon the eggsit then passes through the foraminous material which forms the bottomsof the sections 34 and is free to pass out of the openings 10. Thebottom of the sections 34 may be of netting or wire cloth on which theeggs are deposited and these sections are put in the door 36 and slidaround the cleats until they are properly disposed. In order to preventthe escape of the heated air a supplemental metallic covering 37 isarranged beneath the wooden top 8 in order to deflect the heated air andthrow it downward, and in order to carry off any unnecessary amount ofheated air and to prevent the sides 18 from becoming overheated Iprovide the inclosure within same with several outlets 38 which carrythe overheated air to the outside of the incubator and re lieve it ofany danger of the wood work becoming ignited.

It is obvious that various modifications may be adopted in theconstruction of this incubator and its various parts without departingfrom the essential features above described.

What we claim as new and desire to secure by Letters Patent is:

1. An incubator having a box or body, a structure therein forming achamber open at its lower side, heat radiating means extending upwardlyin and discharging from the bottom of said chamber, and an air inletduct heated by said heat radiating means and dis charging into the upperportion of said box of the body.

2. An incubator comprising a box or body having ventilating openings inits lower side, a structure in said box or body forming a chambertherein, means extending through the said chamber to supply fresh air tosuch box or body, means to heat such chamber and cause the latter byradiation to heat the air in the box or body, a platform on such heater,evaporating pans on the under side of and connected to such platform, athermostat on such platform, and a ventilating device in the upperportion of said box or body including a movable element, and operatingmeans for such movable element, actuated by such thermostat.

3. An incubator having a structure therein forming a heat radiatingchamber and provided at its upper end with .a platform projecting beyondthe sides thereof, evaporating pans under such platform and having tubesextending upwardly through such platform, and supporting devices for thesaid evaporating pans, depending from such platform and includingbuttons to be turned into and out of engagement with the bottoms of theevaporating pans.

4. An incubator comprising a box or body, a heat radiatingelement in thecenter thereof, egg trays in the lower portion of such box or bodyaround such heat radiating device, a fabric above the egg trays andbetween the outer wall of such box or body and the heat radiatingdevice, and means in the uppefpon tion of such box or body to supplymoisture thereto, such box or body having ventilating openings in itslower side.

In testimony whereof I aflix my signature in presence of two witnesses.

CHRIST DAHL Witnesses:

JAMES F. DUHAMEL, H. G. How.

